package com.atguigu.gulimall.auth.Controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * Data time:2022/4/6 16:14
 * StudentID:2019112118
 * Author:hgw
 * Description:
 */
@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    /**
     * 发送验证码
     * @param phone
     * @return
     */
    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {

        // TODO 1、接口防刷

        // 2、验证码的再次校验。redis。 存: key：phone，value：code;   sms:code:手机号 -> 验证码 并设置过期时间，防止同一个phone在60秒内再次发送验证码
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                System.out.println("发送失败");
                // 60秒内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        String code = UUID.randomUUID().toString().substring(0, 5);
        String codeToRedis = code +"_"+System.currentTimeMillis();
        // redis 缓存验证码，
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,codeToRedis,5, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }

    /**
     *  注册
     * // TODO 重定向携带数据，利用session原理。将数据放在session中。只要跳到下一个页面取出这个数据以后，session里面这个数据就会删掉：会出现 分布式Session问题
     * @param vo
     * @param result
     * @param redirectAttributes:模拟重定向携带数据
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes) {
        if (result.hasErrors()) {
            Map<String, String> errors
                    = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors", errors);
            // 如果校验错误，转发到注册页
            return "redirect:http://auth.gulimall.cn/reg.html";
        }


        // 1、校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])){
                // 删除验证码;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                // 验证码通过。真正注册。调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0) {
                    // 注册成功回到登录页
                    return "redirect:http://auth.gulimall.cn/login.html";
                } else {
                    Map<String,String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg", new TypeReference<String >(){}));
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.gulimall.cn/reg.html";
                }
            } else {
                // 验证码出错
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                // 如果校验错误，转发到注册页
                return "redirect:http://auth.gulimall.cn/reg.html";
            }
        } else {
            // 验证码出错
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            // 如果校验错误，转发到注册页
            return "redirect:http://auth.gulimall.cn/reg.html";
        }
    }


    /**
     * 普通账号密码登录
     * @param vo
     * @param redirectAttributes
     * @param session
     * @return
     */
    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session) {
        // 远处登录
        R login = memberFeignService.login(vo);
        if(login.getCode()==0) {
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            // 登录成功放到Session中
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimall.cn";
        } else {
            // 验证码出错
            Map<String, String> errors = new HashMap<>();
            errors.put("msg", login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors", errors);
            // 如果校验错误，转发到注册页
            return "redirect:http://auth.gulimall.cn/login.html";
        }
    }

    @GetMapping("/logout")
    public String  logOut(HttpServletResponse response, HttpSession session){
        // 创建一个名称为 GULISESSION 的 cookie
        Cookie c = new Cookie(session.getId(), "");
        // 设置cookie的最大生存时间为零
        c.setMaxAge(0);
        // 将cookie添加到响应中，发送给浏览器
        response.addCookie(c);
        return "redirect:http://auth.gulimall.cn/login.html";
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session) {
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null) {
            // 没登录，跳转到登录页
            return "login";
        } else {
            // 登录过，重定向到首页
            return "redirect:http://gulimall.cn";
        }
    }

}
